Kissing the Pope's Toe

Matthew of Westminister says, it was customary formerly to kiss
the hand of his Holiness; but that a certain woman, in the eighth
century, not only kissed the Pope's hand, but “squeezed it.” The Church
magnate seeing the danger to which he was exposed, cut off his hand,
and was compelled in future to offer his foot, a custom which has
continued to the present hour.